Cutting apparatus for wallboards and the like



Sept. 23, 1952 J, BUTLER 2,611,179

CUTTING APPARATUS FOR WALLBOARDS AND THE LIKE Filed May 2, 1946 Fig 4 Fig.5

'2 Welded F ug.7. Fig 8 El H :1/' 3 l4 7 J 1 3? 0 I8 I 3 L 00g INVENTOR 5 Joseph F. Butler BY %'z.-,,@;9w

ATTORNEY Patented Sept. 23, 1952 uni-res STATES g 1 AND THE LIKE Joseph F. Butler, Pittsburgh, 5,. p H I 4 Application May 2, 1946, Serial No. 666,715 I 2 Claims. (Cl. 30-287) 1 r This invention relates to improvements in sheet cutting and scoring apparatus especially adapted for use in cutting wall boards of treated.

or untreated fibrous materials, such as plaster,

board, building board, gypsum and other sheets employed in the construction of inner and outer Walls. For this purpose the cutting implement must be of a construction to pass over the end of the sheet to be cut so that it can be drawn across a straight line from edge to edge to score or cut the sheet.

The invention further contemplates mounting of such a, cutting device on a frame in a manner to mount the sheets to be cut on a suitable support 20 subject them to the cutting or scoring action of the implement by merely drawing the latter through a guide mounted adjacent the support.

The invention will become more apparent from a consideration of the accompanying drawing constituting a part hereof, in which like reference characters designate like parts, and in which Fig. 1 is a side elevational view of a sheet cutting or scoring implement embodying the principles of this invention;

Fig. 2 an end elevational view taken along the line 2-2, Fig. 1;

Fig. 3 a cross-sectional view, partially in elevation, taken along the line 3-3, Fig. 1;

Fig. 4 a cross-sectional view taken along the line 4-4, Fig. 1;

Fig. 5 a side elevational view of one of the cutting or scoring blades;

Fig. 6 a topplan view of the end portion of the cutting implement showing a modified form of the device;

Fig. 7 a top plan view of a wall sheet support and guide brackets for holding the cutting implement of Fig. 1;

Fig. 8 a projected end elevational view of the structure of Fig. '7; and

Fig. 9 a rear-elevational view of the structure of Fig. 7.

In the drawing numerals l and 2 designate a pair of cutting arms which are spaced to allow the insertion of the end of a sheet to be cut therebetween. The arms I and 2 may be each a double arm as shown in Fig. 6 or they may be of a structural form like an L-shape to supply rigidity. Regardless of their form or number, they are mounted between a pair of end plates 3 at one end and are unsupported at the opposite end on which cutters 4 are mounted by screw clamps 5, the cutters being in the shape of the blades shown in Fig..5' with preferably a V-edge ii. A. handle; bracket 1 is securedto. the bottom bar 2. as by welding, shownat '8, and gripping. members 9 maybe fastenedto the bracket by screws Ill. The cutting blades 4 are mounted at an angle as shown in Fig. 1, but the cutting edges or points designated by the numeral ll do not come together. The structure of Fig. 1 is such that the cutter arms I and 2 provide a spring action tending to bias the points ll of the blades towards each other when they are run over a sheet in a, manner as will be hereinafter explained.

As shown in Figs. 3 and 4, the bars I and 2 may also be Welded at l2 to the end brackets 3. The cutter may be used by passing it over the edge of a wall board 13, Fig. 7, which, for the purpose of illustration, is shown to be an outside wall building board simulating brick. The bars are mounted in brackets 14 to be slidable therein and the sheet I3 may be mounted on a stand 15 having side guides or angle bars IE to square up the edges of the sheet l3 with the plane of movement of the cutter. Rollers I! are provided as an anti-friction mount for the bar 2 of the cutting member which freely slides thereon, and where the cutter is used on a mount 14 as shown in Figs. 7 and 9, the upper and lower bars I and 2 may be secured against spreading by clamping straps 18. In the position shown in Figs. 7 and 9, the bars I and 2 are disposed on opposite faces of the wall board 13 and cutting of the board is eifected by gripping the handle member I and drawing the bar from the position shown in Fig. 9 to the right, whereby the cutting points Ii are drawn across the wall board l3 to either cut it entirely through or, if the points II are spaced as shown in Figs. 1 and 2, to score the board so that it is readily broken oif when removed from the stand l5.

By the form of cutter as shown, half-inch thick wall boards can be cut oif by a single stroke of the implement across the board as illustrated in Fig. '7, and this can be done without the use of any guide brackets or support by simply passing the cutter bars over the edge and drawing it either horizontally or vertically, depending upon the disposition of the board. By drawing the cutter across the board a straight and square cut will result. By means of the above-described cutting implement, the labor of cutting wall boards is greatly reduced and the mounting of building walls is thereby facilitated.

Although several embodiments of the invention have been illustrated and described, it will 3 be evident to those skilled in the art that various modifications may be made in the details of construction without departing from the principles herein set forth.

I claim:

1. A sheet or board scoring implement comprising spaced bars of substantial length and spaced to receive sheet or board to be scored therebetween, said bars-being rigidlyjoined at one end and separated at the other end to receive the sheet or board, and having at said other end juxtaposed coplanar scoring members extending between and rigidly fixed to said bars with their.

scoring edges spaced from one another, and' ahandle secured to and projecting from one, of said bars near the end remote fromthe'scoring blades for pulling the scoring members; across sheet or board to be scored.

2. A sheet or board scoring implement comprising spaced bars of substantial length and spaced to receive sheet; or board to: be. scored therebetween, said. bars being. rigidly joined at one. end and separated at. the other end tore.

ceivethe sheet or board, .and havingiat said-other end juxtaposed coplanar scoring members extending between and rigidly fixed to said bars with their scoring edges spaced from one another, means for mounting said scoring blades on said bars so that said blades extend diagonally towards said other end, and a handle secured to and projecting from one of said bars near the end remote from the scoring blades for pulling the scoring members acrosssheet or boardto be scored.

JOSEPH F. BUTLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name V Date 521,115 Hopper June 5, 1894 1,098,671 Lundy June 2, 1914 1,306,945. Brey June 17, 1919 1,424,050 Thomas July 25, 1922 2,089,774 Wachstein ,Aug. 10, 1937 2,378,428; Odian June 19', 1945 

